I have been considering going with Royal Purple since I started using it in my WRX. I have been very pleased with it and in all sincerity *DO* feel a difference between that and the Valvoline I used to use.

Considering the VX gets 3k miles on it a year, the price of RP is worth it if I switch over. Currently the VX gets Valvoline SynPower, but by this spring, she goes Purple.

Typically, the only CONS I have and ever hear about are the price of RP. Other than that, it is pretty solid in my book.